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ASTM 5140 10-140mm 1.7035 40Cr Plat Baja Paduan2021-03-24 14:44:13 |
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JIS Baja Bulat Digulung Panas SAE4120 20CrMo 25CrMo4 DIN 1.7218 DIN EN 10083-32023-12-27 17:00:55 |